【Deep bass music and HD sound quality 】 Bass design, just press the bass button ""EQ"", you can enjoy deep bass music in your car whenever you want, which makes you more comfortable when driving. 3 music playing modes, via Bluetooth, U Disk (max. 32G), Micro SD card (max. 32G), HD sound quality, travel is no longer boring. 【7 color backlit and 1.4 inch LED display 】With 7 colors of LED backlight, including red/green/blue/yellow/purple/cyan/white, long press the ""light"" button, in which 7 colors are displayed alternately. What's more, 1.4 inch LED screen creates great visual effects, very convenient to watch. 【3 charging interfaces and PD3.0 quick charge 】 Bluetooth FM transmitter with PD3.0 Type-C port, the PD supports 18W fast charging function. The charging speed is 70% faster than normal. USB Charging Ports: PD/18W, 5V/2.4A, 5V/2.4A Max (U hard disk port). You can charge 3 devices at the same time, which is quite convenient. 【Speaker with microphone 】Support A2DP, excellent built-in microphone with noise reduction technology (CVC), available to make clear calls, ensure driving safety. Support call answer/hang up/reject/redial; Long press the ""Speaker"" button to activate Siri/Google voice assistant. 【Bluetooth V5.0 connection 】It has Bluetooth V5.0, also compatible with V1.2/2.0/2.1/V3.0/4.0/V4.1/V4.2, provides more stable connection. Specifications FM Tuning Range: 87.5~108 MHz Support Audio Format: MP3/WMA/WAV/FLAC Support Bluetooth protocol support: A2DP / AVRCP / HFP / HSP USB 1: supports PD3.0 fast charging (max. 18W) USB 2: 5 V / 2.4 A USB 3: 5V / 2.4A Types of music play: U Disk (max.32G) / Micro SD card (max.32G) / Bluetooth Wonderful deep bass music ( "EQ" button) It's so nice to enjoy your favorite music, especially listening to the auto deep bass music while driving, which is so cool and exciting. This Bluetooth FM transmitter can help achieve deep bass, effect, stimulate your nerves. Beloved car with cool music, help you drive more. Automatic Voltage Monitoring Automatic detection of vehicle voltage and displayed on the LED screen helps you know the voltage status of the car. Below 12 V: dangerous voltage range, the battery must be replaced. Hands-free with microphone Support A2DP, built-in excellent microphone with noise canceling technology (CVC), available to make clear calls, ensure driving safety. Support call answer/hang up/reject/redial